This year’s AGM event will be held on Saturday 24th November 2018 at the Best Western Hotel, Meriden starting at 12.00 prompt with a break in the middle for refreshments. The TR3OC AGM will be held[...]

I bought a set earlier in the month via https://www.ebay.com/itm/Triumph-Trident-T150-T160-X75-BSA-A75-Polyurethane-Clutch-Rubber-Kit-12-/231559807572?nav=SEARCH

Multicoloured (as shown), the Ebay posting at the time indicated that they were the last set and the link above would appear to corroborate that. Maybe try reaching out to Mud Creek Motorcycles to get their provenance?